Shoe-filler composition.



UNITED STATES-PATENT F -f my s'rmLE'Y rnmnnn, or BROCKTON, messncnusnrrs, assienon TOL. o. WHITE snon column, or nnmonwarnn, MASSACHUSETTS, a conronarron or mAssA onusnms. v v

d SHOE-FILLER CQMIPOSITION.

53,27 s eemcauen of Letters Patent. Ho Drawing.

To all whom it may concern;

' Be it known that I, HENRY STANLEY Tm- RELL, a citizen of the United States, residing.

filler, such as is used in the manufacture of welt shoes for filling the cavity in the bottom of the shoe, and particularly to shoe filler compounds of that class which include an inert granular material, such as ground cork,'ground leather, sawdust, etc., mixedwith a binder material. The object of the .invention is to provide a marketable shoe.

bottom filler of this type which can be inexpensively and economically manufactured, which will be permanently pliable at all ordinary temperatures of use, which is water -proof, and which is low -melting, quick-setting and easily workable at a temperature obtained in a steam-jacketed kettle. I propose to use asphalt as the principal ingredient of the binder in my improved shoe filler compound and preferably the natural asphalt such as is obtained from the solid bitumens produced onthe island of Trinidad, or in Venezuela, or Oklahoma, and similar places. This asphalt in its natural condition is brittle when cold, although it will readily soften under moderate temperatures. When soft, it is sticky, tacky,'tough and tenacious. In order to provide a binder which will not be brittle'at ordinary temperatures as the natural asphalt is, but which instead will be ermanently pliable and strongly adherent, I propose to temper the asphalt with a mineral wax or a mineral oil, preferably a paraflin wax or parafiin 7 oil. I find that by mixing a mineral oil or mineral wax of this nature with the asphalt, a binder will be produced which will ing at temperatures of 180 or 190 F. andwhich at this temperaturecan'be readily Application filed Earth 10, 1916. Serial No. 83,43Q. I I

mixed with the inert fillermaterial, such as ground cork, ground leather,, sawdust,

etc.

While I find that asphalt tempered with Patented Mar. 5,' 19 18.'

a mineral oil or mineralwax makes an. ex

cellent binder for shoe filler composition, yet I do not :wish to be limited to the use of mineral oil or mineral wax for this ,purpose as my invention 1s intended to cover a I shoe filler composition havlng a bmder formed from asphalt which is tempered by mixing therewith any suitable ingredient which will reduce the binder to. the desired condition of permanent pliability and whichv will give' to the binder the quick-setting quallty. I

The characteristic ofasphalt varies somewhat, depending upon the particular location from which it is derived and, there- ,fore, the amountof wax or-oil necessary to properly temper it may vary; I- find that a suitable binder for a .filler compound can I ,7 be made by taking approximately pounds g of asphalthaving a melting point .of approximately 115 F. and 25 pounds of par-,- I afiin wax having a melting pointof a'pproximately 125" F. and heating these, ingredients until they are melted, and then mixing them together. To every 70 pounds of this liquid is added approximately 30 pounds of some inert filler material, such as ground cork, ground leather, sawdust, etc., and the whole is thoroughly mixed to produce a homogeneous mass. A compound made in this way will be permanently pliable, will melt at from 110 F. to 120 F., and thus may be readily softened in a steamjacketed kettleand when thus softened it can be easily spread onto the bottom of a shoe. It is tenacious and sticky and will thus readily stick to the shoe, and it has quick-setting properties, so that when applied to the shoe it will quickly set, thus permitting subsequent operations to be per-' formed onthe shoe Without delay. .Moreover, although it is pliable so. that it will easily bend without breaking or' cracking,

yet it is stable and will not shift in position in the shoe while the latter is being used.

-While I-have described herein a particular formula, yet the proportions may be varied, depending on the characterof the asphalt and tempering component used.

I claim: 1. A shoe bottom filler composed of finelycomminuted inert material tenaciously held together by a binder composed of asphalt tempered with a paraflin material to produce a permanently-pliable mass.

2. A shoe bottom filler comprising comminuted inert material tenaciousl held together by a permanently-pliable binder consisting of asphalt tempered with a paraflin material to produce a compound melting at 110 F. to 120 F.

3. A shoe bottom filler comprising comminuted inert material tenaciously held together by a permanently-pliable binder made up of approximately seventy-five per 7 cent. of asphalt.

4. A binder for shoe filler composition comprising an asphalttempered with parafiin material to produce a compound melting at a temperature. of from 110 F. to 120 F.

In testimony whereof, I have signed my name to this specification.

H. STANLEY TIRRELL. 

